3806445809 has 4 divisors (see below), whose sum is σ = 4030354404. Its totient is φ = 3582537216.

The previous prime is 3806445791. The next prime is 3806445827. The reversal of 3806445809 is 9085446083.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3806445791) and next prime (3806445827).

It can be written as a sum of positive squares in 2 ways, for example, as 2872960000 + 933485809 = 53600^2 + 30553^2 .

It is a cyclic number.

It is not a de Polignac number, because 3806445809 - 2⁸ = 3806445553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3806445899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111954272 + ... + 111954305.

It is an arithmetic number, because the mean of its divisors is an integer number (1007588601).

Almost surely, 2^3806445809 is an apocalyptic number.

It is an amenable number.

3806445809 is a deficient number, since it is larger than the sum of its proper divisors (223908595).

3806445809 is a wasteful number, since it uses less digits than its factorization.

3806445809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223908594.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 3806445809 is about 61696.4002920754. The cubic root of 3806445809 is about 1561.3725878406.

The spelling of 3806445809 in words is "three billion, eight hundred six million, four hundred forty-five thousand, eight hundred nine".